699e2fd0de
heading(), change the default value for classes from 'main' to null. heading_with_help(), add 2 additional parameters for level and classnames. Default value of level is set to 2 and classnames is set to null. With the changes for heading_with_help(), icon image vertical alignment needs to be adjusted, so it display in the middle of the heading. Also added some notes in theme/upgrade.txt file.